Ardoino da Piacenza was an Italian cardinal

Cardinal (Catholicism)

A cardinal is a senior ecclesiastical official, usually an ordained bishop, and ecclesiastical prince of the Catholic Church. They are collectively known as the College of Cardinals, which as a body elects a new pope. The duties of the cardinals include attending the meetings of the College and...

. Hi first name is listed also as Arduino.

He was archdeacon of the cathedral chapter of Piacenza

Piacenza

Piacenza is a city and comune in the Emilia-Romagna region of northern Italy. It is the capital of the province of Piacenza...

 and member of the Order of Canons Regular de San Frediano di Lucca. Pope Alexander III

Pope Alexander III

Pope Alexander III , born Rolando of Siena, was Pope from 1159 to 1181. He is noted in history for laying the foundation stone for the Notre Dame de Paris.-Church career:...

 created him Cardinal in the consistory celebrated in Frascati

Frascati

Frascati is a town and comune in the province of Rome in the Lazio region of central Italy. It is located south-east of Rome, on the Alban Hills close to the ancient city of Tusculum. Frascati is closely associated with science, being the location of several international scientific...

 in 1178. Between July 4 and September 6, 1178 he signed a papal bull as Cardinal-Deacon of S. Maria in Via Lata, but shortly thereafter he was promoted to the rank of Cardinal-Priest of S. Croce in Gerusalemme; as such, he signed the bulls from October 1, 1178 until January 8, 1183. He participated in the papal election, 1181

Papal election, 1181

The papal election of 1181 followed the death of Pope Alexander III and resulted in the election of Pope Lucius III. This was the first papal election celebrated in accordance with the decree Licet de Vitenda, promulgated in the Third Lateran Council in 1179, which established that the pope is...

, which elected Pope Lucius III

Pope Lucius III

Pope Lucius III , born Ubaldo, was pope from 1 September 1181 to his death.A native of the independent republic of Lucca, he was born ca. 1100 as Ubaldo, son of Orlando. He is commonly referred to as a member of the aristocratic family of Allucingoli, but this is not proven...

. He wrote an opuscle titled De Deo immortali.

Sources

• Gaetano Moroni
  Gaetano Moroni
  Gaetano Moroni was an Italian writer, the author of the well-known Dizionario di erudizione storico-ecclesiastica.- Biography :Moroni was born in Rome....
  
  , Dizionario di erudizione storico-ecclesiastica da S. Pietro sino ai nostri giorni vol. III, Tipografia Emiliana, Venice 1840-1861, page 13

• Philip Jaffé, Regesta pontificum Romanorum ab condita Ecclesia ad annum post Christum natum MCXCVIII, Berlin 1851, p. 678 and 835

• J. M. Brixius, Die Mitglieder des Kardinalkollegiums von 1130-1181, Berlin 1912, p. 60 no. 1